(ii) 2 m/s Explanation: As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
(ii) 2 m/s
Explanation:
As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward.
(iii) 6 m Explanation: As David moves 1 m towards the mirror, the image also moves 1 m towards the mirror. Now the distance between David and mirror is 3 m and the distance between mirror and image is 3 m. So, the total distance between David and his image will be 6 m. https://www.tiwariacademy.com/Read more
(iii) 6 m
Explanation:
As David moves 1 m towards the mirror, the image also moves 1 m towards the mirror. Now the distance between David and mirror is 3 m and the distance between mirror and image is 3 m. So, the total distance between David and his image will be 6 m.
• Concave mirror is used by dentist, solar furnace, reflector of a torch, etc. • Convex mirror is used in rear view mirrors. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
• Concave mirror is used by dentist, solar furnace, reflector of a torch, etc.
• Convex mirror is used in rear view mirrors.
Characteristics of the image formed by a plane mirror: • Virtual and erect. • Behind the mirror. • Size of image is equal to size of object. • Laterally inverted image (image of left side visible on right side). • Distance of image behind the mirror is equal to distance of object in front of mirror.Read more
Characteristics of the image formed by a plane mirror:
• Virtual and erect.
• Behind the mirror.
• Size of image is equal to size of object.
• Laterally inverted image (image of left side visible on right side).
• Distance of image behind the mirror is equal to distance of object in front of mirror.
• A convex lens can make images which are enlarged or smaller or equal to the size of the object whereas concave lens can always make smaller image. • A convex lens makes both real image and virtual images whereas a concave lens always makes a virtual image. https://www.tiwariacademy.com/ncert-solutRead more
• A convex lens can make images which are enlarged or smaller or equal to the size of the object whereas concave lens can always make smaller image.
• A convex lens makes both real image and virtual images whereas a concave lens always makes a virtual image.
The image, which cannot be obtained on a screen, is called virtual image. The images formed by plane mirror, convex mirror and concave lens are virtual. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
The image, which cannot be obtained on a screen, is called virtual image. The images formed by plane mirror, convex mirror and concave lens are virtual.
A, H, I, M, O, T, U, V, W and X are the letters which form same image as the letter is. These letters are laterally symmetrical. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
A, H, I, M, O, T, U, V, W and X are the letters which form same image as the letter is. These letters are laterally symmetrical.
The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s. The driver sees in his rear view mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be
(ii) 2 m/s Explanation: As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
(ii) 2 m/s
Explanation:
As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessDavid is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be
(iii) 6 m Explanation: As David moves 1 m towards the mirror, the image also moves 1 m towards the mirror. Now the distance between David and mirror is 3 m and the distance between mirror and image is 3 m. So, the total distance between David and his image will be 6 m. https://www.tiwariacademy.com/Read more
(iii) 6 m
Explanation:
As David moves 1 m towards the mirror, the image also moves 1 m towards the mirror. Now the distance between David and mirror is 3 m and the distance between mirror and image is 3 m. So, the total distance between David and his image will be 6 m.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessA virtual image larger than the object can be produced by a
(ii) concave mirror https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
(ii) concave mirror
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessWhich type of lens forms always a virtual image?
Concave lens. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
Concave lens.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessWhich type of mirror can form a real image?
Concave mirror. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
Concave mirror.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessGive one use each of a concave and a convex mirror.
• Concave mirror is used by dentist, solar furnace, reflector of a torch, etc. • Convex mirror is used in rear view mirrors. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
• Concave mirror is used by dentist, solar furnace, reflector of a torch, etc.
• Convex mirror is used in rear view mirrors.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessState the characteristics of the image formed by a plane mirror.
Characteristics of the image formed by a plane mirror: • Virtual and erect. • Behind the mirror. • Size of image is equal to size of object. • Laterally inverted image (image of left side visible on right side). • Distance of image behind the mirror is equal to distance of object in front of mirror.Read more
Characteristics of the image formed by a plane mirror:
• Virtual and erect.
• Behind the mirror.
• Size of image is equal to size of object.
• Laterally inverted image (image of left side visible on right side).
• Distance of image behind the mirror is equal to distance of object in front of mirror.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessState two differences between a convex and a concave lens.
• A convex lens can make images which are enlarged or smaller or equal to the size of the object whereas concave lens can always make smaller image. • A convex lens makes both real image and virtual images whereas a concave lens always makes a virtual image. https://www.tiwariacademy.com/ncert-solutRead more
• A convex lens can make images which are enlarged or smaller or equal to the size of the object whereas concave lens can always make smaller image.
• A convex lens makes both real image and virtual images whereas a concave lens always makes a virtual image.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessWhat is a virtual image? Give one situation where a virtual image is formed.
The image, which cannot be obtained on a screen, is called virtual image. The images formed by plane mirror, convex mirror and concave lens are virtual. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
The image, which cannot be obtained on a screen, is called virtual image. The images formed by plane mirror, convex mirror and concave lens are virtual.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See lessFind out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
A, H, I, M, O, T, U, V, W and X are the letters which form same image as the letter is. These letters are laterally symmetrical. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
A, H, I, M, O, T, U, V, W and X are the letters which form same image as the letter is. These letters are laterally symmetrical.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-15/
See less